Attachment for shoe-sewing machines.



M. H. SULLIVAN. ATTAGHMENT FOR SHOE SEWING MAOHINBS.

' 7 APPLICATION IILE D JAN. 12, 190.7). 935,945."

Patented. Oct. 5, 1909.

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MICHAEL H. SULLIVAN, OF CARBONDALE, PENNSYLVANIA.

ATTACHMENT FOB, SHOE-SEWING MACHINES.

Specification of Letters Patent.

Patent-ed Oct. 5, 1909.

Application filed January 12, 1909. Serial No. 471,917.

To aZlLwhom it mag concern:

Be it lmowntlrat 1, MICHAEL H. SULLI- VAN, a citizen of the United States, residing ,at Carbondale,'in the county of Lackawanna and State of Pennsylvania, have invented a new and useful Attachment for Shoe-SewingMachines, of which the following is a specification.

This invention relates to boot and shoe machinery and more particularly to a rotary cutter for producing a groove in the outer sole of a shoe adapted to receive and house the stitches when sewing the outer sole to the welt.

The. object of the invention is to provide a plate for attachment to the bed of a sewlng machine and having a rotary cutter journaled thereon and adapted to form a groove in the leather in advance of the needle. v 3

A further object is to journal the rotary cutter on the body portion or plate in such a manner as to permit the same to be readily detached when it is desired to stitch the sole to the welt without first forming a groove in the outer sole.

A still further object of the invention is generally to improve this class of devices so as to increase their utility, durability and efliciency as well as to reduce the cost of manufacture.

Further objects and advantages will appear inth'e following description, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings formingapart of this specification -F1gure l is a perspective view of a groove-forming attachment for leather sewing-machines constructed in accordance With my invention showin the same in position on the bedplate 0 v the machine. Fig. 2 is a perspective View of the device detached. Fig. 3 is a transverse sectional view of Fig. 1. Fig. 4: is a plan view illustrating a modified'form of the invention. I

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved device forming the subject matter of the present invention is principally designed for use in connection with that class of boot and shoe machinery employed for sewing the outer sole of the shoe to the welt thereof and by way of illustration is shown in connection with such a machine in which 5 designates the bed-plate. (i the 'presser-bar carrying the presser foot 7, and 8 the needle bar.

The device comprises a flat substantially rectangular plate or body portion 9 preferably formed of a single piece of metal having a central perforation 10 formed therein for the reception-of a screw or similar fastening device 11, whereby the plate may be rigidly secured on the bed 5 of a sewingmachine. 7 4

The walls of the openin 10 are preferably countersunk, as shown, .oas to allow the upper surface of the screw or fastening device 11 to lie flush with the upper surface of the plate 9 and thus offer no obstruction to the passage of the shoe when operating upon the latter.

One end of the plate 9 is formed with a substantially rectangular shaped opening 12 which registers with the needle-receiving opening in the bed-plate 5 and is designed to accommodate the needle as the latter reciprocates.

Extending laterally from one longitudinal edge of the plate 9 and preferably. formed integral therewith is an enlargement 13 having a transverse slot 14 formed therein and connnunicating with the recess 12.

Extending transversely through theslotl l is a pin 15 having its inner end threaded at 15 for engagement with a correspondingly threaded opening in the plate 9, whereby the pin may be readily removed when desired.

That portion of the pin 15 between the opposite walls of the slot 14 is devoid of threads, and mounted for rotation on the smooth portion of the pin is a rotary cutter 16 preferably circular in shape, as shown and having its peripheral edge inclined or beveled in opposite directions to produce a cuttin edge adapted to form a groove in the lower faceof the sole in advance of theneedle, said groove serving to receive and house the stitches and thus prevent the same from the stitches.

which the plate 9 is dispensed With,; the cutter 14 being mounted for rotation in-a slot 17 formed directly in the'hed-plate of the sewing-machine.

l The devices may .be made in different sizes and shapes and difierentstyles of'cutters may be used in connection therewith for forming stitch-receiving grooves of different depths. c

Having thus described the invention what is claimed is 1. The combination with a'sewinganachine bed plate provided with a needle opening, of a mounting secured adjacent said opening and having a slot therein forming a continuation of'said needle-opening, and a rotary cutter journaled in said mounting adapted to engage the work before the same is acted on by the needle.

2. An attachment for sewing-machines comprising a plate having means'for attachment to the bed of a sewing-machineand provided with an opening for the reception -of the sewing-ma chineneedle, there being a slot formed in the plate and communi eating with f the needle-receiving opening, anda roove forming cutter mounted for 0- tation'in the slot.

An attachment for sewing machines including a plate having an opening" formed therein for the reception of a fastening device and'provlde'd at one-end with a needle receivin 0 enin there bein anaenlar e'e D 7 D b ment, extending laterallyfrom one longitudinal edge of vthe plate and provided With-an opening communicating With the needle- .receivmg openlng, a p n extending trans- -vcrselythrough one of said openings and threadedin'the plate, and a grooveforming cutter mounted'for rotation on said pin..

-..In testimony that-I claim the foregoing as my own, 1 have hereto afiixed my signature in the presence-of two Witnesses.

MICHAEL H. SULLIVAN.

Witnesses:

GEO. B. 'PITTs, v (l. R. HARDY. 

